The Superfeet Synergizer Blue Capsule is the most versatile Trim-to-Fit footbed in their line. Because it's a little thinner, it works well in most lower-volume casual and sport (running, mountain biking, or tennis) shoes, or when you can't remove the inner sole from shoes. It is also ideal for flatter feet that may not tolerate the more supportive Green Capsule.1. Rear-Foot Control PointOnly Superfeet provides this feature to control over-pronation, thus helping keep your foot correctly aligned. Result: less stress on muscles and joints.2. Mid-Foot Control PointAnother Superfeet original. This area stabilizes the mid-foot. Combined with Rear-Foot Control Point, this enables you to use your skeletal strength to your advantage. Result: a very stable foot, creating less muscle fatigue and more endurance.3. Patented Support BridgeThis feature activates all the control points for better balance and alignment during the stride. An essential feature exclusive to Superfeet.4. Long-Wearing TrocellenTM FoamWe use only high-quality, durable closed-cell foam. Result: long-lasting comfort for your pursuits.5. Natural Shock Absorption SystemOnly Superfeet uses this three-part system to naturally soften heel shock. This includes: (a) deep heel pocket to center fat pad (b) slight rocker bottom to allow for some foot roll (c) soft flange to allow for some soft tissue expansion.6. New Etc.¿ Top Cover Only from SuperfeetSignificantly reduces friction and heat inside the shoe. Also keeps you cooler in summer and warmer in winter Result: less moisture, blistering and bacteria.7. Patented ShapeContours to your natural foot shape, which helps provide maximum contact with the ground. Result: a confident feeling of balance and control.